Accession Number : ADA118038

Title :   Application of Output Predictive Algorithmic Control to a Terrain Following Aircraft System.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Bise,Michael E

PDF Url : ADA118038

Report Date : Mar 1982

Pagination or Media Count : 118

Abstract : An effective automatic terrain following command generation system is required to safely maintain a desired clearance altitude above the terrain. For survivability, the aircraft must penetrate at transonic or high subsonic speeds at very low altitudes above ground level. This introduces new problems such as wind gusts, a faster radar update of the terrain, faster aircraft response time, and increased pilot workload. To ensure survivability, a control algorithm must be capable of interpreting all of the above input data and perform flawlessly during a terrain following mission. This report uses the terrain following scenario to evaluate a new digital controller, the Output Predictive Algorithmic Controller. This controller was able to track, during low level penetration, actual terrain data using as an aircraft model the F-111/MAW (Mission Adaptive Wing). The F-111/MAW was chosen for this study due to its direct lift capability. Two wing sweeps (35 degrees and 58 degrees) were chosen to evaluate the effectiveness of direct lift during terrain following missions. (Author)

Descriptors :   *Terrain following, *Command and control systems, *Fighter aircraft, *Digital computers, *Flight control systems, Terrain models, Aircraft models, Optimization, Algorithms, Scenarios, Terrain avoidance, Lift, Wind, Gusts, Predictions, Low level, Low altitude, Flight speeds, Clearances, Survival(General), Theses

Subject Categories : Attack and Fighter Aircraft
      Computer Hardware
      Command, Control and Communications Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE